The HE-833 uses the venerable 833A transmitting triode,
first choice of broadcast engineers for audio and transmitter service
for many decades. The 833A was RCA's most powerful glass triode
in the old days, so it is an appropriate choice for our project to
raise the capabilities of directly heated single ended triode
amplifiers to a level where even the most demanding contemporary
loudspeakers pose no challenge. The HE-833 can easily
drive any load, with a sense of total control and delicacy that simply
cannot be obtained through conventional push-pull configurations or
paralleling multiple output tubes for higher output.

Until the invention of our IITC circuit, there was no way to harness
the power of the mighty 833A for Class A audio applications.
The HE-833 uses a triode-wired KT88 driver stage which couples to
the 833A through a low impedance transformer, providing ideal drive
conditions to actualize the full sonic potential of the transmitting
triode. A ultra-low noise, telecommunications-quality Western Electric
437A is used in the input stage for maximum dynamic range. And our
direct-coupled, capacitor-free audio circuitry preserves the low-level
resolution that makes single ended triode amplifiers such a
music lover's favorite worldwide. We guarantee that the authoritative
musical reproduction of the HE-833 will be a revelation regardless of
what you are listening to now! It is no longer necessary to choose
between musical refinement and high power-it is possible to have both
with the HE-833.

Like the other landmark WAVAC Audio Lab. amplifiers, the HE-833 is a statement of
the possibilities of high-tech precision manufacturing. The chassis is
CNC machined out of a 60mm block of aerospace-grade aluminum and
detailed with a handsome shimmering champagne-tinted finish. Custom
sockets with thickly gold plated contacts machined from phosphor bronze
bar stock are fitted in Teflon supports then isolated from the chassis
with an advanced elastomeric suspension. Our Transformers are the
custom-built by the most renowned supplier in Japan under strict
specifications. No shortcuts were taken anywhere in the design and
construction of the HE-833 amplifier, conceived from the start as an
all-out effort to build the finest and most powerful single triode
amplifier ever known.

Enjoy the carefree satisfaction of living with the best. HE-833.

Specification

Power Tube

833

Effective Power output

150 watts

Frequency range

20Hz-100KHz

Input sensitivity

1Vrms

Input impedance

100k ohms

S/N ratio

90dB

Power consumption

500W(each)

Power supply

100,110,120,220,230,240
VAC 50-60Hz
(selected when shipped)

Load impedance

4&8 ohms

External dimensions

435Wx525Dx305H(mm)

Weight

55kg(each)

Features

-HE-833 is upgraded to 150W as a WAVAC Audio Lab. special 10th anniversary
model.

-First and only audiophile amplifier to feature the remarkable 833A
transmitting triode, designed by RCA for critical high-power
commercial applications, with output more than capable of driving any
modern loudspeaker.

-Special adaptation of IITC circuit using a triode-wired KT-88 power
driver delivers tremendous authority across the entire audible
bandwidth with all the subtle flavor of the best single-ended triode
amps.

-Direct-coupled circuitry featuring the superb WE437A input tube
preserves the full dynamic life of music without compression or tonal
coloration.